Stacking stamper



FIG. 1 is a perspective view of a stacking stamper showing our new design, in a disassembled condition;

FIG. 2 is a front elevation view thereof, in an assembled condition;

FIG. 3 is a side elevation view thereof, the opposite side being a mirror image;

FIG. 4 is a top view thereof;

FIG. 5 is a perspective view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a stacking stamper, as shown and described. 